Cal. Food & Agric. Code § 65651

Any person subject to this chapter and allegedly aggrieved hereby or by any rule, or order of the commission shall comply with and exhaust the appeal procedure prescribed, in accordance with this chapter, by the rules and regulations of the commission, before application to any court for relief therefrom. The decision of the commission, in accordance with such rules and regulations, unless arbitrary or without evidentiary support, shall be final and conclusive.